Apparatus fob using- powdekeb fuel



C. I]. YOUNG.

APPARATUS FOR USING POWDERED FUEL.

APPLICATION FILED MAR. 31. IQHS.

lfiw m'fi I Patented July 1, 1919. l

WITN E55 GEES D. YOUNG, 0F ALTOONA, PENNSYLVANIA.

PARATUS FOR USING POWDERED FUEL.

rarer.

T 0 all whom it may concern:

Beit known that 1, CHARLES D. YOUNG, a citizen of the United States,residing at Altoona, in the county of Blair and State of Pennsylvania,have invented certain new and useful Improvements inApparatus for UsingPowdered Fuel, of which the following is a specification.

The invention relates to means for feeding powdered fuel. The inventionis applicable to locomotive or stationary practice, and has for itsprimary objects; the provision of an improved structure which can beapplied to locomotive fire-boxes as now constructed without radicalmodification thereof; the provision of a feeding arran ement for givinga thorough mixture of uel and air before admission to the furnace; andthe provision of a structure in which the precipitation of any slagformed in the combustion is secured, and in which the burning fuel andgases are caused to travel a relatively long and circuitous path beforereaching the fire-tubes, thus insuring a complete combustion and amaximum transfer of heat to the walls of the fire-box. Certainembodiments of the invention are illustrated in the accompanyingdrawings, wherein The figure is a sectional view showing my invention asapplied to a locomotive fire-box.

In the construction illustrated in the fig.

ure. the reference numeral 1 indicates what may be termed the water legportion of a locomotive fire-box while 2 is the portion which may "betermed the ash-box portion of the fire-box, the inventionbeingapplicable to existing types of locomotives by a slight change involvingthe removal of the grates and the lining of the ash-box with the firebrick 3. I

The fire-box is preferably provided with two sets of water tubes 4 and5, the upper 7 set 4 supporting the fire arch 6 and the lower set 5supporting the fire arch 7, theterm fire arch being used in its genericsense to mean a fire wall or bafile wall of any type whether curved inthe form of an arch or not.

Leading from the front end of the furnace are the usual fire-tubes 8,such firetubes terminating at their front endsin the smoke-box. Thefire-box is substantially closed so that the draft through the firetubesfrom the smoke box is partially depended upon to secure the feed of thepowdered fuel and air. I

Extending into the rear end of the ash- Specification of Letters EatenPatented J 1113 1, 1919.

Application filed March 31, 1916. Serial No. 88,028.

box portion of the fire-box is the air tube 9 which surrounds and isspaced away from the supply .tube 10. The supply tube 10 is flared atits rear end as indicated at 11, and into this flared end the powderedfuel is conducted by means of the screw conve er 12 or any other desiredmeans suitable for this purpose. A plurality of converging tubes 13 leadinto the flared end 11, such tubes leading at their other ends into thethrough such tubes and around the tubes and the coal as it drops downfrom above into the tube 10. The plurality of air currents at differentangles is conducive of this result, and the powdered coal as it passesinto the fire-box is very thoroughly mixed with the air, which promotesthorough combustion.- As heretofore indicated, the arrangement isapplicable to the ordinary locomotive with relatively slight changesincident to the lining of the ash-box and the provision of the tubes 5and arch 7 in place of the usual grates. The burning fuel and gases arecaused to travel a relatively long distance before reaching the firetubes by reason of the two arches 7 and 6, thus insuring thoroughcombustion, and a maximum reduction in the temperature of the gasesbefore they pass into the fire tubes. The arrangement also assists insecuring the precipitation of any slag caused by the combustion whichmight otherwise remain in suspension in the gases and finally bedeposited supplementary air inlet space, and means for delivering airunder pressure to the converging pipes.

2. In apparatus for burning pulverized fuel the combination with afire-box having an air inlet tube projecting inwardly from the rearWall, of an air and fuel mixing con duit extending substantially throughthe air inlet tube and discharging into the fire-box,

.an opening in the upper Wall of the mixing conduit through which thepulverized fuel enters, a plurality of inwardly converging air inletpipes leading into the mixing conduit to the rear of said openingextending longitudinally thereof and spaced away from the Walls thereofto provide a supplement-ary air inlet space, and means for deliveringair under pressure to the converging pipes.

3. In apparatus for burning pulverized fuel the combination with afire-box, of an air and fuel mixing conduit discharging into thefire-box, an opening in the Wall thereof through which the fuel enters,a plurality of converging blast air inlet tubes terminating at theirinner ends in a discharge nozzle, and a supplementary air inletsurrounding said tubes, the tubes with their nozzles extending into themixing conduit to a point adjacent the rear side of the fuel entryopening.

CHARLES D. YOUNG.

